SOME, UH, LOVIN’? Jeff Conaway appears before his death last year with John Travolta at a DVD re-release party for their hit film “Grease.” (WireImage)

SOME, UH, LOVIN’? Jeff Conaway appears before his death last year with John Travolta at a DVD re-release party for their hit film “Grease” (above).

SOME, UH, LOVIN’? Jeff Conaway appears before his death last year with John Travolta at a DVD re-release party for their hit film “Grease” (above). (
)

John Travolta just couldn’t resist a quickie with Kenickie.

The Hollywood horndog shocked “Grease” co-star Jeff Conaway when he attempted to give him oral sex while he was sleeping, a bombshell report claims.

Travolta’s steamy Early Morning Fever session happened in the 1990s at Conaway’s home, Conaway’s former fiancée, Vikki Lizzi, told the National Enquirer.

The late Conaway allegedly said he was so dismayed to wake up and find his friend giving him oral sex that it ended his long relationship with Travolta.

Lizzi told the tabloid that Conaway made the claim in a suicide note he left after a failed bid to kill himself in 2006.

Conaway appeared on Broadway in “Grease” for a couple of years with Travolta — who starred as Danny Zuko — before they both were cast in the 1978 film classic.

Conaway played Travolta’s sidekick Kenickie in the film. He died last May from complications of pneumonia at age 60.

Lizzi also claimed that Conaway told her that Travolta, 58, and his wife, Kelly Preston, were locked in a sham marriage.

“Jeff told me that John and Kelly’s marriage was an arrangement,” she told Star magazine. “Jeff said that Kelly knows that John is gay, and that’s why she’s OK with it.”

Another source told Star that Preston signed a contract with Travolta when they were wed, though the source did not know its details.

“Kelly had no problems going into a marriage agreement with John because they were in love,” yet another source told Star.

Through a rep, Lizzi declined to discuss her claims yesterday.

The Conaway sex claim wasn’t the only blow to hit Travolta yesterday.

The Enquirer also interviewed a massage therapist who claims he willingly had sex with the “Saturday Night Fever” star — and that the sex was great!

Rubdown artist Luis Gonzalez said he had a wild romp with Travolta at the Ritz-Carlton hotel in Laguna Niguel, Calif., in 1997, after giving Travolta a massage.

“He’s a great kisser,” Gonzalez told the Enquirer. “Travolta may not identify himself as a gay man, but it doesn’t dismiss the fact that he likes sex with men . . . and he’s experienced at it. I know because I had sex with him, and he loved it.”

Gonzalez said, “I can still remember it like it happened yesterday,” and described Travolta as “very experienced” in the sack.

He said that after the tryst in the hotel room, they soaped each other up in the shower — and then Travolta gave him a paltry 20 percent tip.

Radar Online also claimed yesterday that an employee of a gym that Travolta frequented while filming a movie has become the fourth person to accuse him of sexual shenanigans.

“The gym was opened as a courtesy to John Travolta so that he could avoid the public yet maintain his fitness. The gym employee says that John Travolta groped and fondled him against his will,” a source told the Web site.

“This spate of recklessly published tabloid stories is just part of a malicious tabloid agenda to boost lagging sales by running outrageous defamatory stories about my client sourced by people seeking notoriety or a payday,” Singer fumed in a statement.